CN111173017A - Water stopping device and water stopping method for concrete pouring at bottom of reverse operation well of cyclone well - Google Patents

Abstract

The invention relates to the field of underground water control of reverse operation construction of ultra-deep foundation pits, in particular to a water stopping device for concrete pouring at the bottom of a reverse operation well of a cyclone well, which comprises a water collecting pit, a water seepage pipe and a submersible pump, wherein the water seepage pipe is arranged in the water collecting pit, water seepage holes are formed in the periphery of the pipe wall of the water seepage pipe, a manhole flange is arranged at the upper part of the water seepage pipe, and a water stopping ring is arranged on the water seepage pipe; the submersible pump is arranged in the water seepage pipe. The invention can effectively control the water under the cushion layer and the bottom plate concrete, report the anti-permeability quality of the concrete and reduce the construction cost.

Description

Water stopping device and water stopping method for concrete pouring at bottom of reverse operation well of cyclone well

Technical Field

The invention relates to the field of underground water control of reverse operation construction of ultra-deep foundation pits, in particular to a water stopping device and a water stopping method for concrete pouring at the bottom of a reverse operation pit of a cyclone well.

Background

When the earthwork below the cyclone well is excavated, groundwater can overflow due to various geological factors, according to the current engineering characteristics, for the construction of an ultra-deep foundation pit, the construction quality is often ensured at the end of the foundation pit construction, the current common pouring of the concrete at the bottom of the well is mostly carried out after the groundwater level is reduced to the depth of 3-5 m below a concrete bottom plate cushion layer by adopting a deep foundation pit dewatering mode, the cost is not obviously increased under the high-quality geological condition, when the geological condition has rock strata or springs, the dewatering cost is sharply increased, and the dewatering effect and the concrete pouring quality are also difficult to guarantee. The special situation is that devices like 'pouring jacket bottom plate underwater plugging' and the like are adopted, although the devices successfully carry out bottom sealing operation on concrete, the cost is doubled, and the device is not an optimal engineering solution.

Disclosure of Invention

In order to solve the technical problems, the invention adopts the water stopping device and the water stopping method for concrete pouring at the bottom of the reverse operation well of the cyclone well, and aims to improve the working efficiency and reduce the construction cost while ensuring the construction quality.

The invention adopts the following preferred scheme:

a water stopping device for concrete pouring at the bottom of a reverse operation well of a cyclone well comprises a water collecting pit, a water seepage pipe and a submersible pump, wherein the water seepage pipe is arranged in the water collecting pit, water seepage holes are formed in the periphery of the pipe wall of the water seepage pipe, a manhole flange is arranged at the upper part of the water seepage pipe, and a water stopping ring is arranged on the water seepage pipe; the submersible pump is arranged in the water seepage pipe.

Compared with the prior art, the device has the beneficial effects that:

the device utilizes the mode of mechanical plugging of the perforated steel pipe welding manhole flange to control underground water under the cushion layer and the bottom plate concrete, so that the reinforcement and the concrete pouring are carried out in an anhydrous environment, the construction quality and the construction efficiency are improved, the anti-permeability quality of the concrete can be effectively ensured, and the construction cost is reduced.

Further, the preferred scheme adopted is as follows:

the periphery of the water seepage pipe is provided with steel wire mesh sheets.

The diameter of the sump is phi 800mm, and the depth is h =1000 mm.

The water seepage pipe is a steel pipe with the length of 4000mm and phi 630 multiplied by 10mm, and the periphery of the water seepage pipe is provided with holes phi 10mm @ 100.

A water stopping method for concrete pouring at the bottom of a reverse operation well of a cyclone well comprises the following steps:

A. deeply digging a water collecting pit with the diameter phi of 800mm and the depth h =1000mm at the vacant position before pouring the bottom plate concrete cushion layer;

B. taking a steel pipe which is 4000mm long and phi 630 multiplied by 10mm as a water seepage pipe, and opening holes phi 10mm @100 on the periphery of the water seepage pipe;

C. fixing the periphery of the drilled water seepage pipe by using a steel wire mesh sheet;

D. welding a flange with a manhole at the upper part of the water seepage pipe;

E. welding a water stop ring outside the water seepage pipe;

F. inserting the processed water seepage pipe into the water collecting pit;

G. opening a manhole flange, putting the submersible pump into the water seepage pipe, and continuously dewatering the pipe;

H. performing subsequent work such as concrete cushion layer pouring, bottom plate steel bar binding, concrete pouring and the like in time;

I. when the pumping of the water pump is basically completed, the submersible pump is withdrawn, the manhole of the flange is screwed down, underground water overflowing in the process of withdrawing the submersible pump is timely cleaned, and anti-corrosion treatment is carried out.

Compared with the prior art, the method has the beneficial effects that:

the method utilizes the steel pipe with the hole as the water seepage pipe and fixes the steel pipe by the steel wire mesh sheet, thereby preventing the soil body from collapsing and the submersible pump from being blocked on the premise that the steel pipe has the water seepage function, ensuring the submersible pump to pump water smoothly and improving the working efficiency of the submersible pump; the concrete pouring of the cushion layer and the bottom plate is timely carried out after short-term water inhibition is carried out by adopting the water seepage pipe, so that the construction operation is completed in an anhydrous environment, the construction speed is accelerated, the construction quality is ensured, and the construction cost is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

in the figure: a sump 1; a water seepage pipe 2; water seepage holes 201; a submersible pump 3; a water stop ring 4; a manhole flange 5; a steel mesh sheet 6.

Detailed Description

The invention is further described below with reference to the accompanying drawings and specific embodiments.

A water stopping device for concrete pouring at the bottom of a reverse operation well of a cyclone well comprises a water collecting pit 1, a water seepage pipe 2 and a submersible pump 3, wherein the submersible pump 3 is arranged in the water seepage pipe 2.

Before pouring a bottom plate concrete cushion layer, deeply digging a water collecting pit 1 at an empty position near the pouring, wherein the diameter of the water collecting pit 1 is 800mm, and the depth of the water collecting pit 1 is 1000 mm; the water seepage pipe 2 is a steel pipe with the length of 4000mm and phi 630 multiplied by 10mm, water seepage holes 201 are formed in the periphery of the steel pipe within the range of 1000mm from bottom to top, and the size of each water seepage hole 201 is phi 10@100 (namely the distance between every two adjacent water seepage holes 201 is 100 mm); the periphery of the hole part of the water seepage pipe 2 is fixed by a steel wire mesh sheet 6, so that soil collapse and blockage of the submersible pump 3 in the water seepage process are prevented; the upper portion cover of infiltration pipe 2 is equipped with seal ring 4, and seal ring 4 is arranged in the top of sump 1 in, and the top welding of infiltration pipe 2 has manhole flange 5.

And excavating the water collecting pit 1, dredging underground water pressure and reasonably draining the water into the water collecting pit 1, and selecting a specific vacant position to combine the use functions of different cyclone pools to reduce the influence of the finally exposed manhole as much as possible.

The pipe wall of the water seepage pipe 2 is provided with holes, and the steel wire mesh sheets 6 are added, so that the water seepage pipe 2 has the functions of water seepage and water collection and can prevent soil body collapse and blockage of the submersible pump 3; the top welding manhole flange 5 of infiltration pipe 2 opens and puts into infiltration pipe 2 with powerful immersible pump 3 after the manhole in, can in time withdraw from immersible pump 3 smoothly when immersible pump 3 draws water and accomplish basically. The water stop ring 4 above the water collection pit 1 can achieve the effect of a rigid waterproof sleeve when the bottom plate is poured with concrete, and underground water is prevented from leaking from the side wall of the water seepage pipe.

The control of ground water level can only transient suppression, can not stop water completely, after the short-term restraines water in infiltration pipe 2, in time accomplish the bed course concrete placement, make this part reserve reinforcement speed accelerate and in time carry out bottom plate concrete placement, after whole process in time accomplished, make whole whirl well bottom of the pool and lateral wall and external soil body and water pressure form a balanced state, accomplish the bottom of the pool stagnant water effect promptly.

A water stopping method for concrete pouring at the bottom of a reverse operation well of a cyclone well comprises the following steps:

A. before pouring the bottom plate concrete cushion layer, a water collecting pit 1 with the diameter phi 800mm and the depth h =1000mm is dug deeply at an empty position near the pouring position.

B. A steel pipe with the length of 4000mm and the diameter of 630 multiplied by 10mm is used as a water seepage pipe 2, water seepage holes 201 are formed around the position 1000mm from bottom to top of the water seepage pipe 2, and the size of the water seepage holes 201 is the diameter of 10mm @ 100.

C. After the drilling of the water seepage pipe 2 is completed, the periphery of the position of the opening of the water seepage pipe 2 is fixed by the steel wire mesh sheets 6.

D. And a manhole flange 5 is welded at the top of the water seepage pipe 2.

E. And a water stop ring 4 is welded on the outer side of the upper part of the water seepage pipe 2, and the water stop ring 4 is arranged in the bottom plate concrete.

F. And inserting the processed water seepage pipe 2 into the water collecting pit 1.

G. And (3) opening the manhole flange 5, putting the submersible pump 3 into the water seepage pipe 2 and continuously carrying out precipitation treatment on the underground water in the seepage pipe 2.

H. The immersible pump 3 in the sump pit 1 is after the short-term restraines water, in time carries out follow-up work such as bed course concrete placement, reinforcement bottom plate, concrete placement.

I. After the bottom plate concrete pouring is finished, the strength reaches about 90%, when the submersible pump 3 pumps water basically, the submersible pump 3 is withdrawn and the manhole of the flange is screwed down, underground water which possibly overflows in the process of withdrawing the submersible pump 3 is timely cleaned, and the underground water is subjected to corrosion prevention treatment.

The above description is only for the specific embodiment of the present invention, but the protection of the present invention is not limited thereto, and all equivalent changes or substitutions to the technical features of the present invention that can be made by those skilled in the art are included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a stagnant water device that contrary operation well bottom concrete placement of whirl well, includes sump pit, infiltration pipe and immersible pump, its characterized in that: the water seepage pipe is arranged in the water collecting pit, water seepage holes are formed in the periphery of the pipe wall of the water seepage pipe, a manhole flange is arranged at the upper part of the water seepage pipe, and a water stop ring is arranged on the water seepage pipe; the submersible pump is arranged in the water seepage pipe.

2. The water stopping device for concrete pouring at the bottom of the cyclone well reverse operation well according to claim 1, is characterized in that: the periphery of the water seepage pipe is provided with steel wire mesh sheets.

3. The water stopping device for concrete pouring at the bottom of the cyclone well reverse operation well according to claim 1, is characterized in that: the diameter of the sump is phi 800mm, and the depth is h =1000 mm.

4. The water stopping device for concrete pouring at the bottom of the cyclone well reverse operation well according to claim 1, is characterized in that: the water seepage pipe is a steel pipe with the length of 4000mm and phi 630 multiplied by 10mm, and the periphery of the water seepage pipe is provided with holes phi 10mm @ 100.

5. A water stopping device and a water stopping method for concrete pouring at the bottom of a reverse operation well of a cyclone well are characterized by comprising the following steps of:

A. deeply digging a water collecting pit with the diameter phi of 800mm and the depth h =1000mm at the vacant position before pouring the bottom plate concrete cushion layer;

B. taking a steel pipe which is 4000mm long and phi 630 multiplied by 10mm as a water seepage pipe, and opening holes phi 10mm @100 on the periphery of the water seepage pipe;

C. fixing the periphery of the drilled water seepage pipe by using a steel wire mesh sheet;

D. welding a flange with a manhole at the upper part of the water seepage pipe;

E. welding a water stop ring outside the water seepage pipe;

F. inserting the processed water seepage pipe into the water collecting pit;

G. opening a manhole flange, putting the submersible pump into the water seepage pipe, and continuously dewatering the pipe;

H. performing subsequent work such as concrete cushion layer pouring, bottom plate steel bar binding, concrete pouring and the like in time;

I. when the pumping of the water pump is basically completed, the submersible pump is withdrawn, the manhole of the flange is screwed down, underground water overflowing in the process of withdrawing the submersible pump is timely cleaned, and anti-corrosion treatment is carried out.

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